Clojure Debugger?

Tools like (trace ...) in Lisp are helpful, but most of the time you want an actual debugger. If you are using Eclipse as your Clojure IDE, the plugin Counterclockwise integrates with the usual Eclipse debugger and let's you do all the usual things:

http://code.google.com/p/counterclockwise/

I still remember how, when learning common lisp, I kept looking for how to enable a breakpoint in my code. I wanted a conditional breakpoint that would fire under specific conditions. I was really surprised to learn that you just modify your code and insert a (when something (break)) -- and that (break) function call lands you in a debugger.

I found the elegance and convenience very impressive.

Clojure, unfortunately, is hard to debug, no matter how many trace macros one uses. In a long-running application I would much rather land in a debugger, inspect locals, think about what to do next, walk the frames on the stack, etc.

Tracing functions was available in Lisp shortly after the big flood, when mankind killed the last dinosaurs.

> Once in a while, I have felt the need to find out exactly what was going on at a certain point, and had to awkwardly put in (do (pprint x) x) statements everywhere.

Use this:

https://github.com/dgrnbrg/spyscope

Less awkward and more informative!